The use of petroleum products increases...…… in the atmosphere.
a) Oxygen
b) CO2
c) Vapor
d) None
In the production of greenhouse gases…… countries are on the top.
a) Developed
b) Developing
c) Backward
d) None of these
Sea level is……. due the greenhouse effect.
a) Increasing
b) Decreasing
c) Hot
d) Cold
The climate of desert is usually……………..
a) Rainy and humid
b) Dark and wet
c) Wet and cold
d) Hot and dry
The vapor in the air can condense and form…
a) Air pressure
b) Lightning
c) Humidity
d) Temperature
